1320042042243 has 16 divisors (see below), whose sum is σ = 1956382752160. Its totient is φ = 879683817888.

The previous prime is 1320042042223. The next prime is 1320042042257. The reversal of 1320042042243 is 3422402400231.

1320042042243 is a `hidden beast` number, since 13 + 2 + 0 + 0 + 420 + 4 + 224 + 3 = 666.

It is not a de Polignac number, because 1320042042243 - 2²⁶ = 1319974933379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320042042223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9491080 + ... + 9629157.

It is an arithmetic number, because the mean of its divisors is an integer number (122273922010).

Almost surely, 2^{1320042042243} is an apocalyptic number.

1320042042243 is a deficient number, since it is larger than the sum of its proper divisors (636340709917).

1320042042243 is a wasteful number, since it uses less digits than its factorization.

1320042042243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19122803 (or 19122797 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

Adding to 1320042042243 its reverse (3422402400231), we get a palindrome (4742444442474).

The spelling of 1320042042243 in words is "one trillion, three hundred twenty billion, forty-two million, forty-two thousand, two hundred forty-three".